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What does Lip twitching mean? This means that you are having a sudden involuntary contraction of your lip muscles. It is also called lip fasciculations. It is something that can happen to anyone regardless of age, race, or gender and is a very common occurrence. It can affect your top, bottom, or both lips.
Lips are the structure which covers the opening of the mouth and consists of the upper and the lower lips. Each of the lip is surrounded by the orbicularis oris muscle which encircles its opening.[1] Lip twitching is the sudden abnormal involuntary contractions of the lip muscles. It may sometimes involve the upper, lower or both the lips together. It might be due to some direct stimulation or due to irritation of the nerve supplying the muscles surrounding the lips.